History 370 Research 108 Politics and government 81 Government policy 72 Social aspects 71 History and criticism 65 Social conditions 52 more ... Evaluation 51 Political aspects 48 Foreign relations 46 Medical care 45 African Americans 37 Study and teaching 37 Race relations 35 American literature 34 Education 34 Medical policy 34 Economic aspects 33 Prevention 33 Law and legislation 32 Technological innovations 31 Science 29 Management 28 Soldiers 28 Public opinion 25 Economic conditions 24 Women 24 Political and social views 23 Health aspects 21 Intellectual life 21 less ...